What measures should be taken when the boiler is often on fire?

1. Before coking or ash discharge, 2-3 ash flushing pumps should be started at the bottom of the furnace to ensure that there is enough ash flushing water to soak the dry ash in the cold ash hopper. Only after confirming that the water level in the cold ash hopper has soaked all the ash can the ash door be opened. Before starting the additional ash flushing pump and opening the ash discharge door, the consent of the panel supervisor in the centralized control room must be obtained. When discharging ash, the four-way valve should be carefully and slowly controlled to gradually discharge wet ash in several times. If there is any abnormality, stop discharging ash. When coking occurs, the furnace bottom operator must go to the site for monitoring, and strengthen communication with the centralized control room, and stop coking in time if any abnormality is found.

2. Before opening the ash gate, the tray supervisor should put at least four lower oil guns into stable combustion, ensure that the fuel quantity is greater than 4t/h, and strengthen communication with furnace bottom monitoring personnel. The single adjustment of the speed of the powder feeder shall not exceed 100rpm.

3. The cold ash hopper is not allowed to discharge long-flowing ash, and the water filling condition of the cold ash hopper should be checked regularly. Cold ash hopper should be discharged every 2 hours. If the cold ash hopper is found to have coke or the slag crusher fails, it shall immediately report to the dispatcher and contact for maintenance in time, and shall not be delayed until the next shift.

4. When the boiler is found to be coking, 2-3 oil guns should be put into steady combustion to prevent the boiler from coking again and cause great disturbance to the combustion.

5. When the coal quality becomes worse, the negative pressure in the furnace increases and swings irregularly, the oxygen content tends to increase, and the main steam pressure continues to decrease. At this time, it is necessary to increase the speed of the powder feeder. If the main steam pressure is still falling, 2-3 oil guns should be put into combustion, and then the stable combustion can be adjusted by reducing wind and load.